Synthetic rare earth doped nitric oxide fluorescent powder and preparation method thereof

A nitrogen oxide, rare earth doping technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of poor aging resistance of phosphors, low crystal phase purity of products, harsh synthesis conditions, etc., and achieve strong operability , Avoid the formation of nitrogen oxides, the effect of wide process window
CN101760190AInactive Publication Date: 2010-06-30IRICO
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
IRICO
Publication Date
2010-06-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to synthetic rare earth doped nitric oxide fluorescent powder and a preparation method thereof, which is characterized in that the general chemical formula of the rare earth doped nitric oxide fluorescent powder is A1-xByOzN2 / 3+4 / 3y-2 / 3z : xRe, wherein A is one or the combination of two or more of Ca ion, Sr ion and Ba ion and comes from the oxide, carbonate or nitrate whichcontains A element; B is one or the combination of Si ion and A1 ion, at least contains Si ion and comes from the nitride which contains B element; Re is one or the combination of two or more of Eu ion, Ce ion, Dy ion and Mn ion and comes from the oxide, nitrate or acetate which contains Re element; and the relations of X is more than or equal to 0 and less than 1.0, Y is more than or equal to 1.0 and less than or equal to 2.0 and Z is more than 0 and less than or equal to 2.0 are satisfied. The luminescent material is of stable physical and chemical properties, strong thermal decay resistance and high quantum efficiency, is suitable for excitation of wavelength at 300nm-600nm and is widely applicable in LED lighting and display devices. The fluorescent powder is synthesized through two-step synthesis by taking cheap compounds as the materials and the fluorescent powder synthesized through the method under normal pressure is of pure phase.
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Description

technical field

[0001] The invention relates to a method for synthesizing rare earth-doped nitrogen oxide fluorescent powder, in particular to a method for synthesizing rare earth doped nitrogen oxide fluorescent powder by using common cheap compounds as raw materials under normal pressure. Background technique

[0002] Phosphor-converted white light diodes (pc-wLEDs), which are expected to replace traditional incandescent lamps and become a new generation of daily lighting sources due to their excellent performances such as energy saving, environmental protection, and high efficiency, have attracted much attention from the academic community. The current mainstream method for realizing white light is blue light (440nm-470nm) chip combined with YAG:Ce phosphor. However, due to the lack of red components, the white LED produced by this mode has the defects of low color rendering and high color temperature, which greatly limits its application field. One of the schemes that c...

Claims

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